License and Asset Purchase Agreements	9 Months Ended
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
License and Asset Purchase Agreements	11. License and Asset Purchase Agreements Equinox Science, LLC In February 2020, the Company entered into an Exclusive License Agreement (the Equinox License Agreement) with Equinox, pursuant to which Equinox granted the Company an exclusive, sublicensable, royalty-bearing right and license to certain patents and other Equinox intellectual property to research, develop, make, have made, use, sell, offer for sale and import the compound vorolanib and any pharmaceutical products comprising the compound for local delivery to the eye for the prevention or treatment of age-related macular degeneration, diabetic retinopathy and retinal vein occlusion using the Company’s proprietary localized delivery technologies (the Original Field), in each case, throughout the world except China, Hong Kong, Taiwan and Macau (the Company Territory). In consideration for the rights granted by Equinox, the Company (i) made a one time, non-refundable, non-creditable upfront cash payment of $1.0 million to Equinox in February 2020, and (ii) agreed to pay milestone payments totaling up to $50 million upon the achievement of certain development and regulatory milestones, consisting of (a) completion of a Phase II clinical trial for the compound or a licensed product, (b) the filing of a new drug application or foreign equivalent for the compound or a licensed product in the United States, European Union or United Kingdom and (c) regulatory approval of the compound or a licensed product in the United States, European Union or United Kingdom. The Company also agreed to pay Equinox tiered royalties based upon annual net sales of licensed products in the Company Territory. The royalties are payable with respect to a licensed product in a particular country in the Company Territory on a country-by-country and licensed product-by-licensed product basis until the later of (i) twelve years after the first commercial sale of such licensed product in such country and (ii) the first day of the month following the month in which a generic product corresponding to such licensed product is launched in such country. The royalty rates range from the high-single digits to low-double digits depending on the level of annual net sales. The royalty rates are subject to reduction during certain periods when there is no valid patent claim that covers a licensed product in a particular country. On May 2, 2022, concurrent with the Company entering into the Betta License Agreement (see Note 3), the Company entered into Amendment #1 to the Equinox License Agreement, pursuant to which the Original Field was expanded to cover the prevention or treatment of ophthalmology indications using the Company’s proprietary localized delivery technologies, and certain conforming changes were made to the Equinox License Agreement in connection therewith. No R&D expense was recorded for the three and nine months ended September 30, 2023 related to the Equinox License Agreement, as no milestones were achieved. No R&D expense was recorded for the three and nine months ended September 30, 2022 related to the Equinox License Agreement.

License and Asset Purchase Agreements

9 Months Ended

Sep. 30, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

11.

License and Asset Purchase Agreements

Equinox Science, LLC

In February 2020, the Company entered into an Exclusive License Agreement (the Equinox License Agreement) with Equinox, pursuant to which Equinox granted the Company an exclusive, sublicensable, royalty-bearing right and license to certain patents and other Equinox intellectual property to research, develop, make, have made, use, sell, offer for sale and import the compound vorolanib and any pharmaceutical products comprising the compound for local delivery to the eye for the prevention or treatment of age-related macular degeneration, diabetic retinopathy and retinal vein occlusion using the Company’s proprietary localized delivery technologies (the Original Field), in each case, throughout the world except China, Hong Kong, Taiwan and Macau (the Company Territory).

In consideration for the rights granted by Equinox, the Company (i) made a one time, non-refundable, non-creditable upfront cash payment of $1.0 million to Equinox in February 2020, and (ii) agreed to pay milestone payments totaling up to $50 million upon the achievement of certain development and regulatory milestones, consisting of (a) completion of a Phase II clinical trial for the compound or a licensed product, (b) the filing of a new drug application or foreign equivalent for the compound or a licensed product in the United States, European Union or United Kingdom and (c) regulatory approval of the compound or a licensed product in the United States, European Union or United Kingdom.

The Company also agreed to pay Equinox tiered royalties based upon annual net sales of licensed products in the Company Territory. The royalties are payable with respect to a licensed product in a particular country in the Company Territory on a country-by-country and licensed product-by-licensed product basis until the later of (i) twelve years after the first commercial sale of such licensed product in such country and (ii) the first day of the month following the month in which a generic product corresponding to such licensed product is launched in such country. The royalty rates range from the high-single digits to low-double digits depending on the level of annual net sales. The royalty rates are subject to reduction during certain periods when there is no valid patent claim that covers a licensed product in a particular country.

On May 2, 2022, concurrent with the Company entering into the Betta License Agreement (see Note 3), the Company entered into Amendment #1 to the Equinox License Agreement, pursuant to which the Original Field was expanded to cover the prevention or treatment of ophthalmology indications using the Company’s proprietary localized delivery technologies, and certain conforming changes were made to the Equinox License Agreement in connection therewith.

No R&D expense was recorded for the three and nine months ended September 30, 2023 related to the Equinox License Agreement, as no milestones were achieved. No R&D expense was recorded for the three and nine months ended September 30, 2022 related to the Equinox License Agreement.